I've been trying to get my second email account onto my iPhone 6s Plus for months. I have already a second account I use for work added with no issues. I have tried using two-step verification and I've also turned it off. I've reset the phone, I've restored it(I have done this and then reinstalled my backup from iTunes). Every time I try to add this account to my phone, it accepts the password and then after a few moments of loading on the page that displays what you would like to have synced on the phone, it jumps back to the page to add an account. My account works fine with multiple different iOS and Mac devices and plenty of other email apps. I've seen this multiple times in my shop with customers but no solution. Can anyone help?